The Chargers needed all three of their reserve offensive linemen Sunday against the Titans.

On Wednesday, they added more help.

The team signed guard Steve Schilling, its 2011 sixth-round draft pick who was a final cut in training camp. He is expected to be active Sunday against the Cowboys. Inside linebacker Terrell Manning was waived in a corresponding move.

San Diego's offensive line is coming off a trying week.

After right tackle D.J. Fluker suffered a concussion in practice on Sept. 18, Michael Harris started for him Sunday in Nashville. Two starters in left guard Chad Rinehart (foot) and tackle King Dunlap (concussion) then exited the game. Nick Hardwick was the only Chargers starter to finish where he began. Right guard Jeromey Clary moved to right tackle and Harris moved to left tackle. Rich Ohrnbeger played left and right guard. Johnnie Troutman made his NFL debut at left guard.

Clary has demonstrated toughness throughout his Chargers career. Sunday was the latest example.

The seventh-year veteran finished the game despite a first-quarter clavicle injury that sidelined him Wednesday. San Diego was out of reserves by late fourth quarter, so the next offensive lineman to leave the game would have been replaced by a non-offensive lineman.

Ohrnberger is expected to start against the Cowboys in place of Rinehart. His injury was originally diagnosed as a turf toe, something that has been known to keep some offensive linemen sidelined for an extensive period of time.